Investigation of the interaction of the components in the Y-Si-Sb system at 670 K

Phase equilibria were established in the Y-Si-Sb ternary system at 670 K. The investigation of the phase relations was based on X-ray diffraction experiments made on arc-melted alloys, which were annealed up to 720 h. The 670 K isothermal section consists of 8 three-phase, 12 two-phase and 11 single-phase regions. The formation of a solid solution of Si in the binary YSb compound (8 at.% Si) has been observed. In the Y-Si-Sb system solid solutions between the isostructural binary compounds Y5Si3-Y5Sb3 form a continuous series. One ternary compound was observed: Y5Si2Sb2 (Tm5Si2Sb2 str. type, Cmca space group, a=1.4971(2), b=0.7855(2) and c=0.7820(2) nm)